FPDM1000 SERIES
Positive Displacement
Mechanical Flowmeters
Please read this information
carefully before use!
Before use, confirm the fluid to be used is
compatible with the meter or consult with
OMEGA for advice.
To prevent damage from dirt or foreign
matter, OMEGA recommends a Y or bas-
ket type 60 mesh strainer be installed as
close as possible to the inlet side of the
meter. (If required, contact OMEGA for fur-
ther information.)
NOTE: When a strainer is installed it should
be regularly inspected and cleaned.
Failure to keep the strainer clean will
dramatically effect flowmeter perfor-
mance.
To prevent damage to the meter, slowly fill
the system with fluid. This will prevent dam-
age caused by air purge.
NOTE: Failure to do this could damage the
meter.
For pump applications, turn off the pump
at the end of each day.
▲
!
To the owner:
Thank you for purchasing an OMEGA
FPDM Series Flowmeter. Please take a few
minutes to read through the manual before
installing and operating your meter. If you
have any problems with the meter, refer to
the Maintenance and Troubleshooting sec-
tions of the manual.
This manual contains connection and op-
erating instructions for the OMEGA FPDM
Series meters with mechanical displays.
This includes the following models:
FPDM1004 FPDM1006
FPDM1005 FPDM1007
The OMEGA FPDM Series Flowmeter has
incorporated the oval rotor principal into
its design. This has proven to be a reliable
and highly accurate method of measuring
flow. Exceptional repeatability and high ac-
curacy over a wide range of fluid viscosi-
ties and flowrates are features of the
OMEGA FPDM Series Flowmeter design.
The low pressure drop and high pressure
rating means the OMEGA FPDM Series
Flowmeter is suitable for both gravity and
pump (in-line) applications.
The OMEGA FPDM Series Flowmeters are
available in either Aluminum or 316 Stain-
less Steel. Standard rotors are made from
PPS.
The OMEGA FPDM Series mechanical dis-
plays have a resettable batch totalizer and
non-resettable accumulative totalizer.
1
IMPORTANT INFORMATION
1. OMEGA recommends that when set-
ting up pipework for meter installations,
a bypass line be included in the de-
sign. This provides the facility for a
meter to be removed for maintenance
without interrupting production. (See
Figure 1)
2
NOTE: Incorrect installation can cause pre-
mature wear of meter components
7. Do not overtighten meter connections.
8. It is important that after initial installa-
tion you fill the line slowly, high speed
air purge could cause damage to the
rotors.
9. Test the system for leaks.
10. Check the strainer for swarf or foreign
material. After the first 200 litres, check
periodically – particularly if the flowrate
decreases.
2. Use thread sealant on all pipe threads.
3. For pump applications, ensure pipe
work has the appropriate working pres-
sure rating to match the pressure out-
put of the pump.
4. Install a wire mesh strainer (Y or bas-
ket type 60 mesh) as close as possible
to the inlet side of the meter.
5. Ensure that the meter is installed so
that the flow of the liquid is in the di-
rection of the arrows embossed on the
meter body.
6. The meter can be installed in any ori-
entation as long as the meter shafts are
in a horizontal plane. (See Figure 2) The
register assembly may be oriented to
suit the individual installation.
INSTALLATION
Figure 1
Flow Outlet
Bypass Line
Strainer
Flow Inlet
Figure 2
R I G H T
➧
➧
W R O N G
R I G H T
➧
3
OPERATION SERVICE INSTRUCTIONS
When fluid passes through the meter, the
rotors turn. The gear located on top of one
of the rotors drives the mechanical regis-
ters gear train which provides an accurate
readout.
Figure 3
Rotor #2
Rotor #1
Rotors must be at 90
°
to each other
Disassembly:
Ensure that the fluid supply to the meter is
disconnected, and the line pressure is re-
leased before disassembly. Refer to the
exploded parts diagram on page 6.
1. Remove the four screws located on the
face of the register. Then remove the
faceplate cover including register as-
sembly.
2. Remove the four register mounting
screws. Then remove the lower half of
the register housing.
3. Remove the six coverplate screws and
remove the coverplate.
4. Remove the four meter cap screws and
remove the meter cap.
5. Remove rotors.
Reassembly:
1. Clean all components before reassem-
bly.
2. Before reassembly, check the condition
of the rotors. Replace if necessary.
3. Replace the rotor (with the gear) on the
short shaft in the housing. Then place
the second rotor onto the shaft so as
the rotors are at 90 degrees to each
other. (See Figure 3)
4
Check rotor operation by turning either
of the rotors. If the rotors are not in mesh
correctly or do not move freely, remove
one of the rotors and replace it correctly
at 90 degrees to the other rotor. Recheck
the operation of the rotors.
4. Inspect the gears in the meter cap for
wear. Replace if required - refer to spare
parts on page 6.
5. Replace the O-ring into the groove in
the meter cap. If the O-ring has been
distorted or is damaged in any way, re-
place it with a new part.
6. Replace the meter cap. Make sure the
meter cap and the gear on the rotor
meshes correctly with the gear in the
meter cap. Insert the allen screws and
tighten in the sequence 1, 4, 2 and 3.
7. Inspect the bevel gear, O-ring and out-
put gear for wear or damage. Replace
faulty components if necessary.
8. Replace the output shaft, bush and seal.
Disassembly of output shaft:
a. Remove the bevel gear.
b. Remove the circlip and push out the
output shaft assembly, including the
washer.
c. Remove the seal.
d. Carefully press out the output shaft
bush (if required).
Assembly of output shaft:
a. Carefully press the new output shaft
bush into place. (Use Loctite Primer
7471, as per instructions, followed
by sealant Loctite 262.)
b. Insert a new seal into the groove of
the output shaft bush.
c. Replace the output gear and washer
and replace the circlip to lock the
output gear shaft into place.
d. Replace the bevel gear and tighten
the grub screw onto the flat face of
the shaft.
9. Place the O-ring into the groove in the
meter cap. Replace the O-ring seal if
required.
10. Place the coverplate onto the meter.
Replace the coverplate screws and
tighten the six cap head screws firmly.
11. Place the lower coverplate of the regis-
ter into position. Replace the four screws
and tighten.
12. Position the register correctly on top of
the lower register cover. Replace the four
screws and tighten.
13. Test the meter by turning the rotors with
a finger or by applying low air pressure
(no more than a good breath) to one end
of the meter, before returning meter to
the line.
5
Symptom Probable Cause Corrective Action
FLUID WILL NOT 1. Foreign matter blocking Dismantle meter, clean rotors. Strainer must
FLOW THROUGH rotors be fitted in-line.
THE METER
2. Line strainer blocked Clean strainer.
3. Damaged rotors Replace rotors. Strainer must be fitted in-line.
4. Meter connections over- Re-adjust connections.
tightened
5. Fluid is too viscous See specifications for maximum viscosity.
REDUCED FLOW 1. Strainer is partially Clean strainer.
THROUGH THE blocked
METER
2. Fluid is too viscous See specifications for maximum viscosity.
METER READING 1. Fluid flowrate is too high See specifications for minimum and maximum
INACCURATE or too low flowrates.
2. Fluid is too viscous Bleed air from system.
3. Excess wear caused by Check meter body and rotors. Replace as
incorrect installation required. Refer to installation instructions.
FLUID FLOWS 1. Bevel gear is loose on Tighten grub screws.
BUT NO READING on shaft
ON METER
2. Rotor drive gear is Replace rotor.
damaged
3. Transmission gears Replace gears.
damaged
4. Register gears damaged Replace register assembly.
FLUID LEAKS 1. Seal worn or damaged Replace seal. Check seal compatibility with
INTO REGISTER on the coverplate fluid.
TROUBLESHOOTING
6
4
3
2
1
20
*
21
*
7
10
11
13
12
14
15
16
17
8 / 9
8A / 9A O-Ring Only
5
6
METER PARTS LISTING
Model: FPDM1004
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
11 MS298N Meter Body 1/2 in. NPT (Aluminum)
11 MS337N Meter Body 1/2 in. NPT (Stainless Steel)
21 u BS145TES O-Ring (Teflon
®
)
21 u BS145VS O-Ring (Viton)
32 uMS342MS Rotors PPS (Polyphenylene Sulfide Resins)
32 u MS342MHS High Viscosity Rotors (PPS)
41 MS554S Meter Cap Litres (Aluminum)
41 MS547S Meter Cap US Gallons (Aluminum)
41 MS545S Meter Cap Litres (Stainless Steel)
41 MS546S Meter Cap US Gallons (Stainless Steel)
54 u MS346S Meter Cap Screws (Standard)
54 uMS350S Meter Cap Screws (Stainless Steel)
61 u MS539S Complete Gear Set - Litres
61 u MS541S Complete Gear Set - US Gallons
71 uMS77S Output Gear & Shaft Assembly
81 uMS78S Coverplate Seal / Bush Set Standard
8A 1 u OR42CS Solvent O-Ring (Kalrez)
91 uMS78C Coverplate Seal / Bush Set Solvent
9A 1 u V7-007S O-Ring (Viton)
10 1 u BS145TES O-Ring (Teflon
®
)
10 1 u BS145VS O-Ring (Viton)
11 1 MS99S Coverplate (Aluminum) includes Bush
11 1 MS99-1S Coverplate (Stainless Steel) includes Bush
12 6 u MS312S Coverplate Screws - Litre Model
12 6 u MS313S Coverplate Screws (S/Steel) - Litre Model
12 6 u MS419S Coverplate Screws - US Gallon Model
12 6 u MS420S Coverplate Screws (S/Steel) - US Gallon Model
*
= Parts for US Gallon models only.
u = Recommended Spare Parts to stock.
Bold Text = Indicates Stainless Steel model parts.
7
SPECIFICATIONS
Mechanical Meter Models
Flow Ranges (LPM or GPM)
Above 5 centipoise 1 to 30 / 0.26 to 8
Below 5 centipoise 3 to 25 / 0.8 to 6.6
Accuracy of Reading ± 1%
Maximum Viscosity
*
1000 Centipoise
Maximum Operating Pressure 3450 kPa / 500 PSI / 34.5 Bar
Operating Temperature Range -10°C to 80°C (+14°F to +176°F)
*
Unless high viscosity rotors are fitted.
DIMENSIONS
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
13 1 u MS83S Bevel Gear Set
14 1 MS140S Bottom Register Coverplate
15 4 u MS111S Mounting Screws
16 1 u MS141M4GS Register Assembly w/Coverplate - Litres
16 1 u MS141UGS Register Assembly w/Coverplate - US Gallons
17 4 u MS129S Register Body Screws
20 1 u BS145TES O-Ring (Teflon
®
)
20 1 u BS145VS O-Ring (Viton)
21 1 u MS423S Spacer Ring (Aluminum) US Gallon Model Only
21 1 u MS423-1S Spacer Ring (S/Steel) US Gallon Model Only
8
METER PARTS LISTING
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
11 MS188N Meter Body 1 in. NPT (Aluminum)
11 MS186N Meter Body 1 in. NPT (Stainless Steel)
11 MS188F Meter Body 1 in. ANSI 150 lb. Flange (Aluminum)
11 MS186F Meter Body 1 in. ANSI 150 lb. Flange (S/Steel)
21 u BS235TES O-Ring (Teflon
®
)
21 u BS235VS O-Ring (Viton)
32 uMS72S Rotors (PPS) with Brass Hub
32 uMS72-1HS High Viscosity Rotors (SS) with S/Steel Hub
32 uMS72-1S Rotors (SS) with S/Steel Hub
32 uMS72-2S Rotors (PPS) with S/Steel Hub
32 uMS72HS High Viscosity Rotors (PPS)
32 u MS72HG-2S High Viscosity Rotors (PPS) with S/Steel Hub
41 MS75S Meter Cap Litres (Aluminum)
41 MS75US Meter Cap Gallons (Aluminum)
41 MS251S Meter Cap Litres (Stainless Steel)
41 MS251US Meter Cap US Gallons (Stainless Steel)
56 u MS114S Meter Cap Screws (Standard)
56 uMS200S Meter Cap Screws (Stainless Steel)
61 u MS294S Complete Gear Set - Litres
61 u MS316S Complete Gear Set - US Gallons
71 uMS77S Output Gear & Shaft Assembly
81 uMS78VS Coverplate Seal / Brush Set (Viton)
8A 1 u OR42C Solvent O-Ring (Kalrez)
91 uMS78C Coverplate Seal / Brush Set Solvent
9A 1 u V7-007S O-Ring (Viton)
10 1 u BS145TES O-Ring (Teflon
®
)
10 1 u BS145VS O-Ring (Viton)
Model: FPDM1005
6
2
1
A
10
11
13
12
14
15
16
17
8 / 9
8A / 9A O-Ring Only
5
4
3
1
u = Recommended Spare Parts to stock.
Bold Text = Indicates Stainless Steel model parts.
9
SPECIFICATIONS
Mechanical Meter Models
Flow Ranges (LPM or GPM)
Above 5 centipoise 6 to 120 / 1.6 to 32
Below 5 centipoise 10 to 100 / 2.6 to 26
Accuracy of Reading ± 1%
Maximum Viscosity
*
1000 Centipoise
Maximum Operating Pressure 3450 kPa / 500 PSI / 34.5 Bar or Flange Rule
Maximum Operating Temperature 80°C / 176°F (Stainless Steel Models 120°C / 248°F)
*
Unless High Viscosity Rotors are fitted.
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
11 1 MS99S Coverplate (Aluminum) includes Bush
11 1 MS99-1S Coverplate (Stainless Steel) includes Bush
12 6 u MS312S Coverplate Screws
12 6 u MS313S Coverplate Screws (Stainless Steel)
13 1 u MS83S Bevel Gear Set
14 1 MS140 Bottom Register Coverplate
15 4 u MS111S Mounting Screws
16 1 u MS141S Register Assembly with Coverplate - Litres
16 1 u MS141US Register Assembly with Coverplate - US Gallons
17 4 u MS129S Register Body Screws
18 1 Customer to specify model Legend Plate (not shown) includes Hammer Screws
19 1 MS37 Warning Label (not shown)
Note: Complete Register Assembly Part Numbers; “Litre” Register - MS84, “US Gallons” Register - MS84U.
DIMENSIONS
10
METER PARTS LISTING
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
11 MS192N Meter Body 1
1
/2 in. NPT (Aluminum)
11 MS190N Meter Body 1
1
/2 in. NPT (Stainless Steel)
11 MS192F Meter Body 1
1
/2 in. ANSI 150 lb. Flange (Aluminum)
11 MS190F Meter Body 1
1
/2 in. ANSI 150 lb. Flange (S/Steel)
21 u BS243TES O-Ring (Teflon
®
)
21 u BS243VS O-Ring (Viton)
32 uMS92S Rotors (PPS) with Brass Hub
32 uMS92-1S Rotors (316 Stainless Steel)
32 uMS92-2S Rotors (PPS) with S/Steel Hub
32 uMS92HS High Viscosity Rotors (PPS)
32 uMS92HS-2S High Viscosity Rotors (PPS) with S/Steel Hub
41 MS222S Meter Cap Litres (Aluminum)
41 MS222US Meter Cap Gallons (Aluminum)
41 MS223S Meter Cap Litres (Stainless Steel)
41 MS223US Meter Cap US Gallons (Stainless Steel)
56 u MS116S Meter Cap Screws (Standard)
56 uMS180S Meter Cap Screws (Stainless Steel)
61 u MS295S Complete Gear Set - Litres
61 u MS317S Complete Gear Set - US Gallons
71 uMS77S Output Gear & Shaft Assembly
81 uMS78VS Coverplate Seal / Brush Set (Viton)
8A 1 u OR42CS Solvent O-Ring (Kalrez)
91 uMS78C Coverplate Seal / Brush Set Solvent
9A 1 u V7-007S O-Ring (Viton)
10 2 u BS145TES O-Ring (Teflon
®
)
10 2 u BS145VS O-Ring (Viton)
Model: FPDM1006
6
2
10
11
13
12
14
15
16
17
8 / 9
8A / 9A O-Ring Only
5
4
3
1
1
u = Recommended Spare Parts to stock.
Bold Text = Indicates Stainless Steel model parts.
11
SPECIFICATIONS
Mechanical Meter Models
Flow Ranges (LPM or GPM)
Above 5 centipoise 10 to 250 / 2.6 to 66
Below 5 centipoise 15 to 235 / 4 to 62
Accuracy of Reading ± 1%
Maximum Viscosity
*
1000 Centipoise
Maximum Operating Pressure
**
1800 kPa / 260 PSI / 18 Bar or Flange Rule
Maximum Operating Temperature -10°C to +80°C (+14°F to +176°F) - Aluminum
-10°C to +120°C (+14°F to +248°F) - Stainless Steel
*
Unless High Viscosity Rotors are fitted.
**
Meter conforms to PED 97/23/EC CAT 1.
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
11 1 MS99S Coverplate (Aluminum) includes Bush
11 1 MS99-1S Coverplate (Stainless Steel) includes Bush
12 6 u MS312S Coverplate Screws - Litre Model
12 6 u MS313S Coverplate Screws (S/Steel) - Litre Model
13 1 u MS83S Bevel Gear Set
14 1 MS140RS Bottom Register Coverplate
15 4 u MS111S Mounting Screws
16 1 u MS141RS incl 15 & 17 Register Assembly Complete - Litres
16 1 u MS141RUS incl 15 & 17 Register Assembly Complete - US Gallons
17 4 u MS129S Register Body Screws
DIMENSIONS
6
2
10
11
13
12
14
15
16
17
8 / 9
8A / 9A O-Ring Only
5
4
3
1
1
10
20
*
*
7
5
12
METER PARTS LISTING
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
11 MS520N Meter Body 2 in. NPT (Aluminum)
11 MS520-1N Meter Body 2 in. NPT (Stainless Steel)
11 MS483F Meter Body 2 in. ANSI 150 lb. Flange (Aluminum)
11 MS481F Meter Body 2 in. ANSI 150 lb. Flange (S/Steel)
21 u BS252TES O-Ring (Teflon
®
)
21 u BS252VS O-Ring (Viton)
32 uMS105-1S Rotors (316 S/Steel) with S/Steel Pinion
32 uMS105-2S Rotors (PPS) with S/Steel Pinion
32 uMS105HS-2S High Viscosity Rotors (PPS) with S/Steel Pinion
31 uMS105-1HS High Viscosity Rotors (S/Steel) S/Steel Pinion
41 MS232S Meter Cap Litres (Aluminum)
41 MS335US Meter Cap US Gallons (Aluminum)
41 MS233S Meter Cap Litres (Stainless Steel)
41 MS425US Meter Cap US Gallons (Stainless Steel)
56 u MS243S Meter Cap Screws (Standard)
56 uMS282S Meter Cap Screws (Stainless Steel)
61 u MS363S Complete Gear Set - Litres
61 u MS470S Complete Gear Set - US Gallons
71 uMS77S Output Gear & Shaft Assembly
81 MS78VS Coverplate Seal / Brush Set (Viton)
8A 1 u OR42CS Solvent O-Ring (Kalrez)
91 uMS78C Coverplate Seal / Brush Set Solvent
9A 1 u V7-007S O-Ring (Viton)
10 2 u BS145TES O-Ring (Teflon
®
)
10 2 u BS145VS O-Ring (Viton)
11 1 MS99S Coverplate (Aluminum) includes Bush
11 1 MS99-1S Coverplate (Stainless Steel) includes Bush
Model: FPDM1007
*
= Parts for US Gallon models only.
u = Recommended Spare Parts to stock.
Bold Text = Indicates Stainless Steel model parts.
13
SPECIFICATIONS
Mechanical Meter Models
Flow Ranges (LPM or GPM)
Above 5 centipoise 15 to 350 / 3.96 to 92.46
Below 5 centipoise 30 to 300 / 7.93 to 79.25
Accuracy of Reading ± 1%
Maximum Viscosity
*
1000 Centipoise
Maximum Operating Pressure
**
1800 kPa / 260 PSI / 18 Bar
Operating Temperature Range -10°C to +80°C (+14°F to +176°F) - Aluminum
-10°C to +120°C (+14°F to +248°F) - Stainless Steel
*
Unless High Viscosity Rotors are fitted.
**
Meter conforms to PED 97/23/EC CAT 1.
Item Rec. Part or Set
No. Qty. Parts (Order from this column only) Part Description
12 6 u MS312S Coverplate Screws - Litre Model
12 6 u MS313S Coverplate Screws (S/Steel) - Litre Model
12 6 u MS419S Coverplate Screws - US Gallon Model
12 6 u MS420S Coverplate Screws (S/Steel) - US Gallon Model
13 1 u MS83S Bevel Gear Set
14 1 MS140 Bottom Register Coverplate
15 4 u MS111S Mounting Screws
16 1 u MS141S Register Assembly with Coverplate - Litres
16 1 u MS141US Register Assembly with Coverplate - US Gallons
17 4 u MS129S Register Body Screws
20 1 u MS423S Spacer Ring (Aluminum) - US Gallons Model Only
20 1 u MS423-1S Spacer Ring (S/Steel) - US Gallon Model Only
Note: Complete Register Assembly Part Numbers; “Litre” Register - MS84, “US Gallons” Register - MS84U.
DIMENSIONS
M-4103/ 0405
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
-
9
-
10
-
11
-
12
-
13
-
14
-
15
-
16
-
17
-
18
-
19
-
20
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